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ZERO-ORDER RETARDERS, Crystalline quartz
These are air-spaced, double plate Retarders. All surfaces are AR coated. These are no more nor less accurate than the multiple-order type under ordinary laboratory conditions. However, these have wider bandwidth and less sensitivity to temperature change than the multiple-order type. Aperture is 15 mm in 1" cell with scribed line indicating slow axis. These Retardation Plates are within the "zeroeth" order of retardance, that is between (0λ-1λ).

Specifications
Aperture: Clear aperture 15mm mounted in 1" OD cell
Substrate Material Crystal quartz
Transmitted Wavefront λ/10 at 633nm
Surface Quality 10-5 laser quality
Diameter Tolerance + 0.00mm, - 0.25mm
Parallelism 0.5 seconds
Retardation Tolerance 0.5% of design value at 20ºC

 

Quarter-wave Retarders

Catalog Number
& Wavelegth
Bandwidth
Field
of View
Temp.
Stability (Df/C)
RZ--193
1.9 nm
0.4
0.00013
RZ--213
2.1 nm
0.5
0.00014
RZ--248
2.5 nm
0.6
0.00018
RZ--266
2.6 nm
0.6
0.00022
RZ--308
3.1 nm
0.6
0.00026
RZ--325
3.2 nm
0.7
0.00029
RZ--351
3.5 nm
0.7
0.00029
RZ--442
4.4 nm
0.8
0.00029
RZ--488
4.8 nm
0.8
0.00029
RZ--514
5.1 nm
0.9
0.00029
RZ--532
5.3 nm
0.9
0.0003
RZ--633
6.3 nm
1.0
0.0003
RZ--670
6.6 nm
1.0
0.0003
RZ--780
7.7 nm
1.1
0.00031
RZ--830
8.2 nm
1.1
0.00031
RZ--852
8.4 nm
1.1
0.00031
RZ--980
9.7 nm
1.2
0.00032
RZ--1053
10.4 nm
1.3
0.00032
RZ--1064
10.5 nm
1.3
0.00032
RZ--1310
13.0 nm
1.5
0.00033
RZ--1480
14.7 nm
1.6
0.00033
RZ--1550
15.4 nm
1.6
0.00034
RZ--1560
15.4 nm
1.6
0.00034
*Value assumes a tolerable phase retardation error of 1%
MANY MORE WAVELENGTHS IN STOCK.
IF NOT, WE’LL MAKE IT.

 

Half-wave Retarders

Catalog Number
& Wavelegth
Bandwidth
Field
of View
Temp.
Stability (Df/C)
RZ--193
1.9 nm
0.6
0.00028
RZ--213
2.1 nm
0.7
0.00029
RZ--248
2.5 nm
0.8
0.00034
RZ--266
2.6 nm
0.8
0.00042
RZ--308
3.1 nm
0.9
0.00051
RZ--325
3.2 nm
0.9
0.00058
RZ--351
3.5 nm
1.0
0.00058
RZ--442
4.4 nm
1.1
0.00059
RZ--488
4.8 nm
1.2
0.0006
RZ--514
5.1 nm
1.2
0.00061
RZ--532
5.3 nm
1.3
0.00062
RZ--633
6.3 nm
1.4
0.00062
RZ--670
6.6 nm
1.4
0.00062
RZ--780
7.7 nm
1.6
0.00062
RZ--830
8.2 nm
1.6
0.00063
RZ--852
8.4 nm
1.7
0.00063
RZ--980
9.7 nm
1.8
0.00063
RZ--1053
10.4 nm
1.8
0.00064
RZ--1064
10.5 nm
1.9
0.00064
RZ--1310
13.0 nm
2.1
0.00064
RZ--1480
14.7 nm
2.2
0.00065
RZ--1550
15.4 nm
2.3
0.00065
RZ--1560
15.4 nm
2.3
0.00065
*Value assumes a tolerable phase retardation error of 1%
MANY MORE WAVELENGTHS IN STOCK.
IF NOT, WE’LL MAKE IT.


MICA RETARDERS
OFR manufactures and stocks ¼-wave and ½-wave retarders in common laser wavelengths, cemented between protective glass cover plates. We do not AR coat mica retarders, as internal transmittance is ~85%. However, mica retarders are very high quality plates, with uniform retardance across the aperture, and wavefront distortion <¼-wave. Because of the natural absorption of mica, insertion losses become quite high with increasing wavelength (the plate becomes thicker). Thus, for practicality, we do not recommend mica retarders beyond ~850 nm. Mica Retarders are guaranteed to be accurate within 1% of peak value.

Material Mica between glass
Retardance ± 1%
Parallel 2 minutes

λ/4 Wave*
Catalog Number
λ/2 Wave*
Catalog Number
Wavelength
Bandwidth
FOV
Temperature
Stability
RA--488
RA-½-488
488 nm
± 6 nm
> ± 2°
< 0.1 nm/°C
RA--514
RA-½-514
514 nm
± 6 nm
> ± 2°
< 0.1 nm/°C
RA--633
RA-½-633
633 nm
± 6 nm
> ± 2°
< 0.1 nm/°C
RA--670
RA-½-670
670 nm
± 6 nm
> ± 2°
< 0.1 nm/°C
RA--780
RA-½-780
780 nm
± 6 nm
> ± 2°
< 0.1 nm/°C
*Value assumes a tolerable phase retardation error of 1%

 

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